SIGSEGV running FDM
Steps to reproduce:
clone sources from git
$ mkdir build; cd build; cmake .. -D LARCH64=1 -D BO64=1 -D BO64_BINFMT=1 -D CMAKE_BUILD_TYPE=RelWithDebInfo
$ make -j4
extract FDM(https://files2.freedownloadmanager.org/6/latest/freedownloadmanager.deb) to /opt
$ export BOX64_LD_LIBRARY_PATH=/data/ACE/bookworm-env/usr/lib/x86_64-linux-gnu:/opt/freedownloadmanager/lib
$ BOX64_TRACE_FILE=/tmp/box64-002.log BOX64_LOG=debug /opt/freedownloadmanager/fdm

[box64-002.log](https://github.com/user-attachments/files/17988137/box64-002.log)